package com.itheima.Test4;

public class CalculatorDemo {
    public static void main(String[] args) {
            useCalculator(new Calculator() {
                @Override
                public int calc(int a, int b) {
                    return a+b;
                }
            });

    useCalculator((int a ,int b)->{
        return a+b;
    });


    }
    public static  void useCalculator(Calculator c){
        int result =c.calc(10,20);
        System.out.println(result);
    }
}


interface Calculator{
     int calc(int a, int b);
}
